Remote control system



March 16, 1943. J. J. VAN HORN REMOTE CONTROL SYSTEM Filed Aug. 16, 1941SQQQ INVENTOR -11 J WmHWn BY I HIS A'l TORNEY 5 EQQQ bxhw Patented Mar.16, 1943 UN TE! S TES TE OFFICE 2,313,903 I armors CONTROL sys'rniuJames J. Van Horn, Pittsburgh, Pasa ssignor to The Union Switch 85*Signal Company; Swissvale, Pat, a corporation of Pennsylvania Ani istAugust s, 19 1, Serial 1516'; 407,201

1 2 Claims.

' My invention relates to remote control systems, and more particularlyto centralized traffic control systems for railroads for the control ofrailway signals, track switches or the like from a central office,and'for the indication'of such devices at the"control'omcel' 5 I Oneobie'ct'of my invention is the provision of means for'attimes'ccfintroliing a visual indicator at the 'oflice accordi g to" thecondition of the corresponding device in' the f eld and at other timescontrolling such device accordingtoth'e position of a inanually'pperablelever at the ofiice over the sameime channel, by means of continuouslytransmitted codes of impulses 'oi a istinctive frequency. The system "ofmy invention is arranged to' employ existing communication circuits inorder to eiiectthe transmission of such controls and indicationsreliably and'economically over long distances, and possesses a highdegree of immunity against any interference resulting from the jointuseof the same line wires by other communication facilities or from anyforeign current inte'rferencelikely to occur in long distanceflinecircuits. v My invention is an improvement upon that disclosed in acopending application for Letters Patent of the United $tates Serial No.409,287, filed June 28, 194 by Gk Baughman,--ior Remote control systems,and like that of Baughman, in its specific embodiment is illustrated asarranged for thecontrol of a 'manual block signal for governing trafiicmovements intoa stretch of track not equippedwith trackci-rcuits; andfor continuously indicating at the control ofilce when such signalis inits stop position."

The apparatus oi my invention is adapted to use line wires which arealso used withoutinten ference, by acentralized traflic controlcode'system of the impulse code type. A feature of my invention residesin arrangements for using such impulse codes, transmittedintermittently, for selecting the direction 'of transmission fornoninteriering continuous codes of the frequency typeQoVer the same linewires. 7

I shall describe one iorm of apparatus embodynovel features thereof inclaims.

Referring to theacco'mpanying drawing, the lineardiagram at the-toprepresents a 'stretch of railway track havin'ga portionincluding; atrack switch WI. Itis to be understood that'switch WI is controlled froma tower Al by means of a centralized traiiic control system of the impulse code type, such for example, as'that disclosed in Letters Patentof the pinited states No. 2,229,249, granted January 21, 1941;. to L. V.Lewis,

ing my invention and shall then-point out the for Remote control'systens. When switch'Wi is reversed, it connects this portion with astretchof single track" extending to a second tower AL constituting a manualblock?" having a short detector section with a track relay ZTS directlyin advanc'ebf signal R2, but otherwise not provided with track circuits,and over which train move ments aregoverned by the manual block signalsR2 andL'L Sigh'aI R2 is'gover'ned by'the'appara'tusof my inventionashereinaft'er described, by remote :contror fromtow'e'r A'I, whilesignal L4 is'm'anually controlled by a local operator at l aw Mu,'Ihe'reierence characters Y and Z designate two line wires extendingbetween towers Al and A2 which provides; telephonechannel which may 'beused for the transmission"ofinformation to the operator at trSwerAZ asrequired 'forthe manual control ofs'ignal' lii ifandfor OSfing orreporting'the'pas'sag'eof a complete train, or'reporting the "positionof signal 114 to the operator Thline wires Y and Z also provide a linecircuit" for "th im'pulsecode system by Which the track switch WIandother apparatus included withintheC. T. C. territory but not'shov'vnherein,-isgoverned from tower Al."

This line circ'uit is normally closed and energized'fr'om a'cen'traloffice batteryitli "and comprises a metallic circuit" including line'wire's Y and'Z in "series; the windings 'ofc'ode responsive line relaysBR, 13, etc; fofcontrolliiig the coding units oE theC. T. Cf. system;and also including contacts or transmitter relays such as OT, IT, etcllby mans ofivhich different impulse codes are delivered "to the linecircuit. This IiheCirc'i'i'i't as shown differs frohfthat shown'dn theabovementioned Lewis patent, in that suitable low'*pa-ss-""filters are"interposed between 'the C'. rc' ppaiams and the linewires in the man'-ner shown in'll'ig. -1 of Letters Patent ofthe United States NO.2,208,616," g'ral'itd July '16, 1940, to George W. Bau'ghman -forRemotecontrol apparatu's'} For simplicity only'the C. T. C. officeu'nit'andone station unit'are shown herein, and these only in diagrammatic form,since thedetails of construction and operationof this apparatus may beascertained from the abovementioned patents. a

ln'addition, the line wires Y and Z afford a simplex or phantomcircuit-comprising the two line wiresinmultiple with earth return, whichmay be used either as'a control line channel over accordance with myinvention, by means of noninterfering impulse codes transmitted over thesame line wires through the medium of the above-mentioned C. T. C.system. The line signals transmitted over the control and indicationchannels are preferably of the continuous code type, and in the specificform shown, are transmitted as impulses of alternately opposite polarityderived from a direct current source and having a constant frequency ofthe order of 75 to 180 cycles per minte. The impulses are refrom thelocal direct current source to the ince'ived by the line relays FBI andPR2, and these relays govern apparatus which is selectively responsiveto frequencies of this order, which apparatus is adapted to convert theimpulses into pulsating direct current to govern the signal relays ZHRand ZDR and the indication relay ZNK.

Signal R2 is illustrated as the usual three-position color light signalhaving lamps G, Y and R for indicating clear, permission or stop,respectively. Lamp Y or G is lighted when one or both, respectively, oftwo signal relays 2I-IR -dication line channel, and since this channelemploys a ground return, condensers are interposed so that the samebattery may be used for the control of other circuits which are to bemaintained free from grounds, in accordance with the usual practice inthe railway signaling art.

This indication line channel may be traced from ground at condenser 16over contact 5 of relay ISGCTI, back contacts 9 and ll! of relays ZHRand 2D R to terminal B, thence through the 7 local source of currenttoits other terminal C and ZDR, and also the track relay 2TS for the 7short detector section in advance of signal R2 are energized and lamp Ris lighted when relay 2TS or 2HR is deenergized.

The signal relays 2I-IR and ZDR are governed by continuous codes offrequencies of 75 and 180 cycles per minute, respectively, transmittedover the control line channel in accordance with the position of asignal control lever 2L and. of a push button ZPB, as hereinafterpointed out.

Lever 2L has a dual function, and in addition to governing thesignalrelays it also governs the transmission of QT. C. codes and in thisrespect functions like lever HK, shown in Fig. 5 of the above mentionedPatent No. 2,229,249. That is, with lever 2L in its right-hand orreverse position, if a starting key SK is pressed momentarily, animpulse code is transmitted by the oflice unit of the C. T. C. systemduring which wire N14 is energized, and this code is receivedselectively by the station unit at the location of'signal R2 to energizewire 85 momentarily to/pick up a signal control relay RHS. Relay RHSthen remains picked up overa stick circuit including wire 86 until adifferent code is received in response to a subsequent operation of keySK with lever 2L in its left-hand or normal position, whereupon relayRHS releases due to the deenergization of wire 86. The referencecharacters for those partions of the C. T. C. system shown herein-arethe same as those for corresponding parts in Patent No. 2,229,249, inwhich these operations are more fully explained, relay RI-IS, forexample, being shown in Fig. 8 of the patent. It is to be noted,however, that the circuits for relay RHS shown herein differ from thoseof the patent, in that as shown herein relay RHS is not released when atrain enters the associated track section and furthermore, it cannot bereleased by a C. T. C. code unless the signal relay ZHR is already inits release position.

The indication relay 2NK controls a lamp ZRE for indicating to theoperator when the manual block signal R2 is at stop, and is governedover the indication line channel by a continuous code having a frequencyof 180 cycles per minute.

With relay RHS released, as shown, a circuit is closed from one terminalB of a local source of direct current over its back contact 3 and theback contact 4 and winding of a relay contactfi of relay IBOCTI,resistor [1, back contact H of relay RHS to the mid-point connection ofcondensers 1, thence through condensers 7 and coils 8 to line wires Yand Z and through similar coils 3 and condensers 7 at the oflice, frontcontact I2 of relay ZNK, and the winding of the line relay PR! toground. When relay 2NK is released, the indication channel may becompleted over its back contact I2 provided the normal contact 13 oflever 2L is closed, as

shown.

The line relay PRI isa sensitive relay of the stick polar type and itscontact is operated to the right or left according to the polarity ofeach impulse delivered by relay I88CTI and is held magnetically by a'definite biasing force in its relay of the usual railway signaling type,and

when the indication line channel is completed as described its contactsrepeat the code operation of the contacts of relay IBBCTI, operatingtimes per minute,

Relay CDI delivers impulses of alternately opposite polarity to adecoding transformer and thence to a resonant decoding unit IBUDUIincluding a tuned circuit and a rectifier by means of which the normalindication relay ZNK is selectively energized. These decoding circuitsare substantially similar to those for relay K3 shown in Letters Patentof the United States No. 1,773,472, granted August 19, 1930 to Paul N.Bossart, for Railway traific controlling apparatus, and provide a highdegree of selectivity for the reasons explained in the patent, so thatrelay 2NK responds selectively to 180 code only.

A front contact 14 of relay ZNK controls a red lamp 2RE located on theoperators control panel at the oifice adjacent the signal lever 2L} LampZRE therefore is normally maintained lighted only aslong as thecommunication line extending to the location of signal R2 is energizedand intact and the back contacts of relays 2HR, ZDR and RHS remainclosed;

It will now be assumed that the apparatus is in its normal condition asshown, and that the operator at tower Al, knowing that the manual blockis unoccupied, reverses switch WI by me'ans of the C. T. C. system andthen reverses lever Pr s s the starting key SK w t h i Y (mt-"r a 1 Q0-left-to a t. 1 6 e e 2 o circuit-' from terminal B "arrd normal agita egentleman-* iPBfthe hack earnest and Winding-Of reIay 'l-E C 'I] totermihaf QJ- Relay afcod trarismittefi'sim'ilartdlBflCTfin type butdilferin themes in that "when ener gizecl relay 150T ope aftes' itsontacts' re eatecl-ly .2 ont' co'ri'tacts conditions the continuous codenee re ay PRl',"bht renysrm and cnz n'pw eisrate- 75 times per minuteand relay 213R, con- 6 He'd by the decodin'gunitlwDUl consequentlimpulses or alternataybpposite polarity to the zissatiateal decodingtransformer an these impinssare rectified bycb'ntaet" *of that relay td'energize relay 2BR. *"The circuits for relay zi-IR correspofi d to thosefor" relay-H in Letters and relay2HR'is responsive=toeither"'75or" 180'codebut" noh responsiveto foreignalternating currents such a's might besupplied thereto, for example, through the d'ecbdih'gtransformer" fromatf'alternating current battery charger connected a'ro'ssterminals B andC of the-local source."-" I nemy-ammo; hicks uppl'ighting lamp Y tocause" ="signa1"R2 "to 'display a permissive *indica ti'on,"ai1d"contact 26 df relay 2BR- c'onnectsterxfiihal B' t6 Wire 89 of the-stati'on coding unit of the 'C. T. 6'; system to initiatethetransmisston of an indication code as "explained in Patent No? 2,229,249; topickflp the in-dicaticn stick re'layi ZHK at the ofiice. therebylighting'the'sig rial" indication 1amp-2YE.-"-

It will now be assumed that the operator presse's-thepushbu'tton'ZPBw-The closing" of crfta'ct "21 energizes "relay- C-T2,= similar toISBGTI', in p13i0f"TCT; and'contacts '20 and 2815i "push bl'ltton 21 Binterpose thepo'le changer canteens and' wofrelay' 1'80671 2 inthecontrol line channel in series with the oflice battery to bothenergized to light 1am SiEnaT'RZ toin'di'cate clear. Similarly; @0 61may 213R applies energy to wire I itiate by the TLC. system Eo p'Ick upthe indication stick relay IDK to hght lamfiiGE'at theofiic'e in placeer lamp *Itwill be apparent from the foregoing that to jcause 's ignalR'z 't'o' indicate permissive or clear",

the 'op on"- of two independenttransmission systems is 1nvolved,that"isrelay RHSisffir'st pielli i by n ilfibuI'se'bOde' and l-el ays lHRandIDR' aYE they? picked up by continuous codsl After rela -ma es once beenpicked up, its com tact g fib1a-re1ay l ans nicked" uplocally; so thatthe-eontinuity dfthe controllinechannel eanhot be interrtiptdinadvertently by my C ,t

iv' or clar sole'ly by the -continuous" codenamein 8d hver th leverentacts ls andle;

heassii iied' 'tha-t'a train governed by sigr'xa R? now enters thedetector tracks'ection,

releasingthe tr I k relay 2T8; The cl'rcmpi ng' of cdfitaemz df relayZTS causes signal'Rg to"indi'- cate stop, even through relays ZHR and{213R remaiflenerg'i zed. The dr0ppingof contacts 33 and-34 erra'yITSinitiateS an impulse" code which releases relays and EDI; ana'pcks u'fp' tfie -tra'ck indiction stick relay" ZTKQ so that lamb QTE iSlightedfand -1arhb-2GE' or is extinguished, "Idutl'am p ZRE does nctbecome d J i l: III I Ll," lt" w ll' b -seeiihat the track relay 2T5 isa stick relay anq wi-ll remainieleased after the 'va'cates""thedetctorsectiQn unless relay LRHS i's' released to *close it's backcontact 35fbiit relay RH "no-vfhl'c l energiied over contact 3! dfrelaiy2HRQ-- To pick ub I relay 2T3, the 015'- erator must first restore lever2L to normalto d-i tifiuthe-continuouscodeand thereby releaseyZHREandmu'St then operate'key SK momentarily-"t6 transmit an impulsecodeto releaserelay RHs; Assuming "that the operator pe formsthe's'-operationsfthe release of relay RHS' v'vithrelays-"231Rand ZDRde'energized'wifl re-initiate the transmission of cedeover theindication line eharinel to-bicli up rela'yiNK' and light lamp ZRE. Thenwhen the train vacates the detectorsectiomrelay ZTS picks up overcontadt 'si fif relay HHS; alfid by deeliergizing wire '91-, initiateshn {impulse code to release relay Z 'IKK thereby"extinguishing lamp ZTEand restoring th abpa'ratus'to the normal condition as Itwill be seenthat relay ZTS functions as an ordinary 'n0n-stick*"1 'e1ay'when atrainmoving fromfiighfltoleft passes through the detector section; sincein' this"case'lever' 2U remains in its normal position and relay 'Rrrs"'is not picked upkrJ 51'" Q .l

i -It will also be seen that the arrangement is such as toinsure-thatlever 2L"is returned to normal after each train movement fromleft to rightpast signal R2, and that relay 2TS cannot bebickdupafterthe train 'vacates the detector sectionas a'result of atemporary failure of the circuit' 'fdr controlling signal R2 as longas'lever 112 s reversed:

"--*="It--is- 'to-'be*understood that my invention is notlimifidtoth'us'e'hf the particular type of contint-ions codesignals describedherein nor to thenseof a'simplex line circuit for the trans -C. codeiand thsigriall is held at permisv mission of these signals but otherwell-known forms may be substituted, for example, alternating current ofa commercial frequency such as 60 or 100 cycles per second which ismodulated or interrupted at a low rate such as 75 to 180 times perminute, may be used, as employed for controls in the system of theabove-mentioned Baughman application. Also such currents or carriercurrents of higher frequencies which may also be used may be connectedso as to employ the line wires Y and Z in series, like the C. T. C. linecircuit, with frequency discriminating apparatus at each point ofconnection, in place of the parallel connection with ground return, asshown, such an arrangement being preferred under certain circumstances,as for example, when my invention is applied to a railroad employingelectrical propulsion and deriving the energy for the propulsion oftrains from circuits having an earth return. In any case, the same linecircuit may be used for transmission of continuous codes of likecharacter in either direction, with the same insurance against improperoperation of the receiving apparatus by the transmitting apparatus atthe same end of the line circuit as provided in the particular formherein shown and described. i

Thus for example, the 180- code transmitted over the indication linechannel holds relay 2NK picked up, and front contact l2 of that relaymaintains the continuity of the indication line channel regardless ofthe position of lever 2L untilthe operator disconnects the source of theindication code by picking up relay RHS. Similarly, the 75 or 180 codetransmitted over the control line channel holds relay Zl-IR' picked up,and contact 3| of that relay holds relay RI-IS picked up to mantain thecontinuity of the control line channel until the operator disconnectsthe source of the control code by restoring lever 2L to normal.

Although I have herein shown and described only one ,form of remotecontrol apparatus embodying my invention, it is understood that variouschanges and modifications may be made therein within the scope of theappended claims without departing from the spirit and scope of myinvention.

Having thus described my invention, what I claim is:

1. In a remote control system, two stations connected by line wires, acode transmitterat each station for delivering impulses to said linewires, a line relay at each station adapted to receive such impulses, amovable contact at each station which in a first position connects theassociated code transmitter to said line wires and in a second positionconnects the associated line relay to said line wires, and meanscontrolled by each line relay when receiving impulses from said linewires with the associatedmovable contact in its second position formaintaining said associated movable contact in its second position aslong as the line relay continues to receive impulses.

2. In a remote control system, two stations connected by line wires, acode transmitter at each station for delivering impulses to said linewires,-a line relay at each station adaptedto receive such impulses, amovable contact at each station which in a first position connects theassociated code transmitted to said line wires and in a second positionconnects the associated line relay to saidline wires, manually operablemeans for governing the operation of the movable contact at one stationto its second position, means remotely controlled by said manue allyoperable means for governing the operation of the movable contact at theother station to its second position, and means associated with eachmovable contact when operated to its second position for maintaining itin such position as long as the associated line relay is receivingimpulses from said line circuit.

3. In a centralized trafiic control system for railroads, a stretch ofrailway track including a block section, a signal for governing trafiicmovements into said block section, a signal relay for clearing saidsignal, asignal control relay at said signal location; a signal leverand an indication relay at adistant control oifice, a-first and a secondline circuit connecting said signal location with said ofiice, means fortransmitting impulse codes over the first line circuit to pick up saidsignal control relay when said lever is reversed and to release saidsignal control re.- lay when said lever is restored to its normal po;sition, a control channel including a reverse contact of said lever,said second line circuit and a front contact of said signal controlrelay for ,at times continuously energizing said signal relay, and anindication channel closed in response to the return of said lever to itsnormal position including said second line'circuit, a back contact ofsaid signal control relay and a contact closed when said signalindicates astop for continuously energizing said indication relay. 7

A. In a centralized traffic control system'for railroads, an ofiice andastation connected by a line circuit, a signal-at said station, a signalrelay for clearing said signal, a signal control relay at said station,a-signal lever and an indi cation relay at said ofiice, means efiectivewhen said signal lever is reversed and said sign-a1 7 control relay isreleased, and said signal is at stop,

to energize said line circuit at'said station and to connect saidindication relay thereto at said office, and means including a secondline circuit for controlling said signal control relay in ac 'cordancewith the position of said signal lever.

5. In a centralized traific control system for railroads, an ofiice anda station connected by line wires, a signal, a signal relay and a signalcontrol relay at said station, a signal lever and an indication relay atsaid oflice, a control circuit for energizing said signal relayincluding a "source of current at said oifice, a reverse contact of saidlever, said line wires, and a front contact of said signal controlrelay, an indication circuit for energizing said indication relayincluding a source of current at said station, aback contact of saidsignal control relay, said line wires, a normal contact of said lever,and a contact closed only when said signalindicat'es stop, meanscontrolled by said signal relay when energized for clearing said signal,and meansin eluding a second line circuit for governing said signalcontrol relay to prepare said control'or indication circuit according tothe position of said signal lever.

6. In a centralized traffic control system-for railroads, an ofiice anda station connected by line wires, a signal, a signal relay and a signalcontrol relay at said station, a signal lever and an indication relay atsaid oflice, a. control circuit including a reverse contact of saidlever.

said line wires and a front contact of said signal control relay, anindication circuit including a back contact of said signal controlrelay, said line wires and a normal contact of said lever, means at theoffice for supplying current periodically varied at a low frequency rateto said control circuit to selectively energize said signal relay, meansat the station effective only when said signal indicates stop to supplycurrent periodically varied at a low frequency rate to said indicationcircuit to selectively energize said indication relay means controlledby said signal relay when energized for clearing said signal, and meanscontrolled over said line wires for at times governing said signalcontrol relay to prepare said control or indication circuit according tothe position of said signal lever.

7. In combination, an c-ilice and a station connected by line Wires, amanually operable lever at said oflice, a control relay at said stationgoverned in accordance with the position of said lever, a signal relayat said station, an indication relay at said ofiice, a control circuitfor said signal relay including a reverse contact of said lever, saidline wires and a front contact of said control relay, an indicationcircuit controlled by said signal relay, including a back contact ofsaid control relay and said line wires, for controlling said indicationrelay, and means for completing said indication circuit in response tothe return of said lever to its normal position comprising a normalcontact of said lever.

8. In combination, an office and a station connected by line wires, amanually operable lever and an indication relay at said office, acontrol relay at said station governed in accordance with the positionof said lever, a movable device at said station, a control circuitincluding a reverse contact of said lever, said line wires, and a frontcontact of said control relay for selectively controlling said movabledevice, an indication circuit including a back contact of said controlrelay, said line wires and said indication relay for selectivelyindicating the condition of said movable device, and means forcompleting said indication circuit in response to the return of saidlever to its normal position comprising a normal contact of said lever.

9. In combination, an oilice and a station connected by line wires, amanually operable lever and an indication relay at said office, acontrol relay and a movable device at said station, a control circuitincluding a reverse contact of said lever, said line wires, and a frontcontact of said control relay, an indication circuit including a backcontact of said control relay, said line wires and a normal contact ofsaid lever, means at the oflice for supplying current periodicallyvaried at a low frequency to said control circuit when said lever isreversed, means at the station for supplying current periodically'varied at the same low frequency to said indication circuit when saidmovable device occupies a given position, means controlled over saidcontrol line circuit including selective circuit elements tuned toelectrical resonance at said low frequency for selectively controllingsaid movable device, means controlled over said indication line circuitincluding other selective circuit elements tuned to electrical resonanceat said low frequency for controlling said indication relay, and meansfor operating said control relay in accordance with the position of saidlever.

10. In combination, an office and a station connected by line wires, amanually operable lever and an indication relay at said office, acontrol relay and a movable device at said station, means at the officeand station for delivering spaced impulses of alternately oppositepolarity to said line wires, polar relays at the ofiice and stationoperable alternately between two positions in response to such impulsesand held magnetically in their last operated positions between impulses,a control circuit for transmitting said impulses from the ofiice to thestation including a reverse contact of said lever, said line wires, afront contact of said control relay and the polar relay at said station,means effective when the polar relay at said station is operatedrepeatedly by impulses received over said control circuit forcontrolling said movable device, an indication circuit for transmittingsaid impulses from the station to the office including a back contact ofsaid control relay, a normal contact of said lever and the polar relayat said Ofi'lCE, means effective when the ofiice polar relay is operatedrepeatedly by impulses received over said indication circuit forcontrolling said indication relay, and means for operating said controlrelay in accordance with the position of said lever.

11. In combination, an office and a station connected by line wires, adetector section of railway track at said station, a manually operablelever at said oiiice. a stick track relay normally held energized overits own front contact and the track rails of said section, a signal forgoverning traffic movements into said section, a signal relay and asignal control relay, a circuit for clearing said signal including frontcontacts of said signal relay and said track relay, a line circuit formaintaining said signal relay energized including a reverse contact ofsaid lever, said line wires and a front contact of said signal controlrelay, a pick-up circuit for said track relay including a back contactof said signal control relay and the track rails of said section, andline controlled means for energizing said signal control relay inresponse to a movement of said lever to its reverse position and forreleasing said signal control relay in response to a movement of saidlever to its normal position.

12. In combination, an oi'lice and a station, a detector section ofrailway track at said station, a manually operable lever at said ofiice,a stick track relay normally held energized over its own front contactand the track rails of said section, a signal for governing traflicmovements into said section, a signal relay and a signal control relay,a circuit for clearing said signal including front contacts of saidsignal relay and said track relay, a direct wire lin circuit formaintaining said signal relay energized including a reverse contact ofsaid lever and a front contact of said signal control relay, a pick-upcircuit for said track relay including a back contact of said signalcontrol relay and the track rails of said section, a second line circuitfor controlling said signal control relay in accordance with theposition of said lever, and means including a front contact of saidsignal relay for maintaining said signal control relay energized whensaid first line circuit is energized irrespective of the condition ofsaid second line circuit.

JAMES J. VAN HORN.

